Legend:

Could you please download the build of [http://www.virtualbox.org/download/testcase/VBoxDD.dll.r77799 VBoxDD.dll] with enabled logging? After downloading please, replace original VBoxDD.dll from VirtualBox 4.1.15 r77799 with downloaded DLL (please, safe original DLL in safe place). Then please launch your VM in the following way

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Could you please download the build of [http://www.virtualbox.org/download/testcase/VBoxDD.dll.r77799 VBoxDD.dll] with enabled logging? After downloading please, replace original VBoxDD.dll from !VirtualBox 4.1.15 r77799 with downloaded DLL (please, safe original DLL in safe place). Then please launch your VM in the following way